-24.34% is the change from 830 to 628
Calculation steps:
[( 628 - 830 ) ÷ 830] x 100 = -24.34%
Formula
Percentage change = [(628 - 830) / 830] x 100
Subtract the new number by the original number
628 - 830 = -202
-202 ÷ 830 = -0.2433734939759036
-0.2433734939759036 x 100 = -24.34%